The printer cannot read or write to at
least one print cartridge memory tag or
at least one memory tag is missing.
I have followed the steps as per troubleshooting page:
1. Turn the printer off and then back on.
2. Press for more information.
3. If the error persists, contact
HP support at http://www.hp.com/
support/clj5550.
And I have now ordered a new cartridge but is the memory chip and DC controller part of the printer or of the cartidge?